Featuring an ultra-high capacity of 3500mAh, these 1/2 D rechargeable batteries last up to twice as long as ordinary Ni-CD batteries. The large nominal capacity also makes the ideal for power intensive application such as radios, remote controls cars and more. The 1/2 D rechargeable batteries have a voltage of 1.2V, and the batteries enjoy a long cycle life. The cycle performance is 80% of initial capacity after 500 charges.